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Aspect ratio is a term used to describe the proportional relationship between the width and height of an image, video, or display screen. It is expressed as the ratio of the width to the height, and is typically written as two numbers separated by a colon, such as 16:9 or 4:3.
The aspect ratio of an image or video affects how it appears on a screen or monitor. If the aspect ratio of the image matches the aspect ratio of the screen, it will fill the screen without any black bars on the sides or top and bottom. If the aspect ratio of the image is different from the aspect ratio of the screen, the image will be either stretched or cropped to fit the screen.
Here are some common aspect ratios used in different contexts:
- 4:3: This is the standard aspect ratio used for older television sets and computer monitors. It is also known as the "fullscreen" aspect ratio.
- 16:9: This is the standard aspect ratio used for high-definition television (HDTV) and widescreen computer monitors. It is also known as the "widescreen" aspect ratio.
- 21:9: This is an ultra-wide aspect ratio used for some high-end computer monitors and cinema screens. It is also known as the "cinema" aspect ratio.
Aspect ratio is an important consideration when creating or choosing images or videos to display on a particular screen or monitor. It is also an important factor to consider when purchasing a new monitor or television.
